ARM Programs-Rate and Payment Change Date

Our bank would like to offer a 20/15, 25/15 and 30/15 loan where the interest rate is fixed for 15 years then changes one time for the remaining term. Everyone we've talked to says these are ARM loans. However, in our loan platform all ARM programs must have a subsequent rate and payment change date. Is anyone else offering these products? If so, how are they disclosing?